Great Lakes Water Levels and NewsJuly 25th, 2014 at 12:48 am by Bill Steffen under Bill's Blog, News, Weather
Picture from Jack Martin of a Lake Superior sunset near Munising on 7/18. Lake Michigan/Huron (one lake for lake level purposes – connected at the Mackinac Bridge) is 2″ higher than it was one month ago and an incredible 15″ higher than it was one year ago. Each extra inch of water on Lake Michigan represents an additional 390 billion gallons, so 15″ would be an increase of 5.85 TRILLION gallons! Lake Michigan/Huron is now just 4″ below the long-term average. It’s now 27″ above the lowest July level of 1964 and 36″ below the highest July lake level in 1986. Lake Superior is up 2″ in the last month and up 11″ year-to-year. Superior is now 7″ above the long-term average and only 6″ below the highest ever July lake-level of 1950. Lake Erie is down 1″ in the last month, unchanged in the last year and 4″ higher than the century average. Lake Ontario is down 3″ in the last year, but 2″ higher than the long-term average. Lake St. Clair is up 1″ in the last month, up 7″ in the last year and 4″ above the century average. The outflow from Lake Superior down the St. Marys River into Lake Huron is expected to be above average through the rest of the summer. The Grand River in Grand Rapids is running (as I write this) at about double average flow (3400 cfs vs 1620 cfs average). The Muskegon River at Croton is at 1150 cfs compared to an average of 1210 cfs. The Kalamazoo River at New Richmond is at 1630 cfs compared to an average of 1729 cfs.
News: Fastest 12-month lake level rise on Lake Superior since 1916. Sewage overflows in Chicago not the fault of “global warming“. Update on Enbridge replacing pipeline. More support anchors for Great Lakes oil pipelines.